Hey, replacing a shot battery on a mid 2012 macbook pro running opencore big sur, the battery was shot so bad that it held no charge whatsoever and power would just cut out if you used too much power even when plugged in. Anyhow, noticed some browning on the board, gonna attach a pic here. Been in this thing fifty times and haven't noticed it before but haven't payed attention to it either until now since it is an elderly machine. Wondering if this browning on stuff looks normal or if I should try to clean it off with qtip and alcohol or if it is a sign of serious overheating and the boards lifespan is coming to an end. If you look at the light squares you can see it.
